Rand-trimmer



(No Model.)

J. W. PLUMMER. RAND TRIMMER.

No 449,232. Patented Mar. 31, 1891.

INVEN'TEIFR:

' heel'seat.

UNITED STATES PATENT Fries.

JOHN PLUMMER, OF SOMERVILLE, MASSACHUSETTS.

RAN D-TRIMMER.

SPECIFICATION forming part of Letters Patent No. 449,232, dated March 31, 1891.

Application filed May 9, 1890. Serial No.351,125. (N0 model.)

To all whom it may concern:

Be it known that 1, JOHN W. PLUMMER, of Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvementsin Rand-Trimm ers, of which the following is a specification.

This invention relates to rotary trimmers for trimming the rand and heel-seat portions of boot or shoe heels after the heel has been partially trimmed by a cutter-head, which trims the lower portion of the heel to its final shape, but leaves the heel-seat portion somewhat full, so that said heel-seat portion and the rand have to be trimmed bya subsequent operation. In trimmers of this class arest is provided for the lower or previously-trimmed portion of the heel, and a series of knives, each having an angular cutting-edge formed to act on the rand and heel-seat simultaneously, are arranged with one end of the heel-seat trimming portion of each knife flush with said rest, the latter acting as a guard to prevent the knives from cutting into thecompletely-trimmed portion of the heel below the Frequent grinding of the cuttingedges of the knives is required to keep them in the proper condition, and in order that free access of the grinding-tool may be had to the said cutting-edges without marring the rest or guard for the previously-trimmed portion of the heel itis necessary to remove the knives from the rest.

My invent-ion has for its object to permit the removal of the knives from the rest for grinding without disturbing or changing the relative positions of the knives, so that when replaced each knife will occupy the desired relation to the rest without the necessity of readjustment thereto.

The invention also has forits object to provide improved means for adjusting the knives whenever it may be necessary to compensate for wear of their cutting-edges.

To these ends my invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a side view of a rand-trimmer embodying my invention. Fig. 2 represents a sectional view of the same. Figs. 3 and 4- represent views of opposite sides, and Fig. 5 a perspective view of the series of knives and their holder removed from the rest and the shaft which rotates the trimmer. Fig. 6 represents a perspective View of the holder and one of the knives disconnected from each other. Fig. 7 represents a sectional View of the complete trimmer, showing a modification.

The same letters and numerals of reference indicate the same parts in all the figures.

In the drawings, a represents the holder to which the knives b b are secured. Said holder is adapted to be applied to and removed from the shaft 0, which forms a part of an organized heel-trimming machine and is rotated by power. of a sleeve 2, formed to surround the shaft 0, and a circular flange 3, formed on said sleeve and projecting outwardly therefrom;

The knives b b are of segmental form, and each is composed of a base or seat 4, formed to bear against the flange 3 of the holder, a flange 5, formed on said base and having one end sharpened to form the heel-seat-trimming edge 6, and a lip 7, the sharpened end of which is formed to trim the rand. Each knife is pivotally connected to the flange of the holder by a screw 01 near its rear end, and is adjustably connected with said flange between its ends by a screw e, passing through a segmental slot f in the flange. The knives are therefore adapted to be rigidly secured to the holder by tightening the screws cl 6, while by loosening said screws the cutting end of either knife can be adjusted to vary its distance from the center of the shaft 0. The cutting-edges of each knife are outside the periphery of the flange of the holder, as shown in Figs. 3 and 4.

t represents the rest for the previouslytrimmed portion of the heel. Said rest is preferably a disk of metal bearing against a shoulder j on the shaft 0 and in contact with the bases 4 of the knives, as shown in Figs. 1 and 2, the rest, knives, and holder being held in place by the rand-guard 7c and a nut m, screwed upon the reduced outer end of the shaft c and bearing against the rand-guard.

It will be seen that when the knives are adjusted and secured to the holder the knives and holder may be removed from and applied to the shaft as one piece. When the knives Said holder is composedand holder are removed from the shaft, they are of course separated from the rest 2', so that a grinding-tool may be inserted in the space between the cutting end of one blade and the rear end of the next and the cutting-edges ground without difficulty, the removal of the knives from the rest creating an unobstructed space across the cutting end of each knife. After the grinding operation the knives and holder may be replaced on the shaft, no readjustment of the knives being required unless the grinding operation so reduces the length of the knives as to require outward adjustment to bring their cutting-edges flush with the rest 1', in which case the screws may be loosened and the knives swung outwardly to the required extent. This adjustment is not required, however, at every grinding. It Will be seen, therefore, that the holder and the knives attached thereto, all adapted to be removed as one piece from the shaft and rest and reapplied as one piece without adjustment of the knives, saves much time in applying the knives to the shaft by reducing to the minimum the time required for adjusting the knives.

In Fig. 7 I have shown the rest as a piece of metal attached to the fixed bearing 4, in which the shaft rotates instead of being attached to the shaft. In this case the restdoes not revolve and does not of necessity extend entirely around the trimmer, but only far enough to afford the proper support for the heel.-

I claim.

1 In arand-trim1ner, the combination, with a rotary shaft and with a rest for the previ-' ously-trimmed portion of the heel, of a holder separable from the shaft and rest and composed of a sleeve formed to receive the shaft, an outwardly-proj ectin g flange on said sleeve, a series of knives adj ustably attached to the said flange and projecting outside of the periphery thereof, each knife having a sharpened flange 5, provided with a rand-lip, and a base or seat at, formed to bear on the flange of the holder and secured thereto, the flan geof the holder being narrower than the rest and having its margin arranged inside .the cutting-edges of the knives, whereby when the said holder and knives are separated as one piece from the shaft and rest openings are provided across the cutting-edge of each knife for the reception of a grinding-tool, so that the knives may be ground without being moved or displaced with relation to each other, as set forth.

2. In a rand-trimmer, the combination,with the holder composed of the shaft-receiving sleeve and the knife-holding flange thereo said flange having segmental slots, of the knives composed of the flat bases or seats 4, pivotally connected at their rear ends with said flange by screws (1 and adjustably connected with said flangenear their cutting ends by screws 6, which are movable in said slots, and the sharpened flanges 5, provided with rand-lips, as set forth.

3. In a rand-trimmer, the combination of the shaft, the rest for the previously-trimmed portion of the heel, the knife-holder having a shaft-receiving sleeve, the knives having the flat seats or bases adj ustably secured to said sleeve, and the rand guard and nut,whereby said holder is detachably secured to the shaft, as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 29th day of April, A. D. 1890.

JOHN WV. PLUMMER.

IVitnesses:

O. F. BROWN, A. D. HARRISON. 

